Magpul MAG672-GRY PRS Gen3 Precision Stock Fixed Adjustable Comb Stealth Gray Synthetic for AR-15, M16, M4The PRS GEN3 is a field precision stock for AR15 M16 and AR10 SR25 platforms, featuring tool less length of pull and cheek piece height adjustment. With solid adjustments for length of pull and cheek piece height via aluminum detent knobs, the PRS GEN3 (Precision Rifle Sniper) stock provides a stable interface and is intended for semi automatic sniper or varmint type rifles. Offering a nearly universal fit, it is optimized for rifle length receiver